Edge-burnishing machine



G. BOULTON EDGE BURNISHING MACHINE "Aug. 11, 1936.

Filed Ma'roh 18, 1935 2 Sheets-Sheet 1 Q n m n 2 L m m 3 m h mw m M rf, m z w m M m f y 2 M n m l /w7 Ur m \w /l I l//l/ l ,.y 0| ,l lil 7 Il l w 2 l i Mw Aug. 11, 1936. G. BOULTON 2,050,264

EDGE BURNISHING MACHINE` f v Filed March 18, 1935 2 Sheets-Sheet 2 Tigr.

Patented Aug. 11, 1936 EDGE-BURNISHING MACHINE Georg-e Boulton, Rochester, N. Y., assignor to United Shoe Machinery Corporation, Paterson, N. J., a corporation of New Jersey Application March 18, 1935, serial No. 11,546

18 Claims.

This invention relates to machines for burnishing the edges of various articles, it being especially intended foi' finishing the exposed edges of shoe-parts which are not to be folded.

My invention has as an object the provision of a machine of the character above indicated, in which a burnishing member is effectively actuated and heated, in which the work is advantageously presented to said burnishing member, and in which the operating elements are adjustable, so they may be positioned to best perform their functions. To this end, an oscillatory or otherwise movable burnishing tool is mounted upon a leverV from which it extends toward vthe plane of the work and in said plane. The lever ispreferably actuated by a slide contacting with it and moved by an eccentric. The work may be advanced for the burnishing by the co-operation of two members and urged toward the burnishing member by the action of one or both of said advancing members. Herein is disclosed a worksupporting member which exerts this lateral force by transverse ribs upon its work-engaging periphery, and a pressure member-which acts by movement against the work in an inclined direction. Heat is preferably applied to the burnishing member by an electrical device presenting an extended heating surface along which said member moves. Adjustments are furnished for the burnishing member, the pressure member and the heating member, whereby their relation may be varied as the work in hand requires.

In the accompanying drawings of a particular embodiment of my invention,

Fig. 1 shows my improved machine in side elevation, partsbeing broken away;

Fig. 2 is an irregular section taken just above the heating unit and pressure-roll; l

Fig. 3, a similar view taken above the slide through which the burnishing tool is actuated; and

Fig. 4, an enlarged detail in elevation o-f portions of the work-supporting and pressure-rolls and the burnishing tool.

As appears in Fig. 1, a machine-frame I arranged for mounting upon a bench is provided with a lower horizontal arm I2 and an overhanging arm I4 divided at its outer extremityyinto lower and upper portions I6 and I8, respectively. Secured in a horizontal position upon the arm I2 is a table 26 having a slot through Vwhich projects the periphery of a work-supporting roll 22. The Work-engaging surfaceof this roll has transverse ribs 24, which are preferably inclined inwardly and rearwardly, as viewed in Fig. 1.

The purpose of this vribbed formation will later be developed. The roll 22 is fast upon a horizontal shaft 26 journaled in the frame and joined by gearing 28, 28 and a vertical shaft 36 to a driving yshaft 32 rotatable in the upper portion of Vthe frame. Power may be applied to the shaft 32 through a belt 34.` By this means the roll 22 is turned in an anti-clockwise direction as seen from the left in Fig. 1. The action of the roll is, therefore, to advance work, supported upon the table and indicated at W, from the operators position at the front of the machine. A plate v35, secured to the table-top adjacent to the inner side of the roll 22 and covering a portion of the slot, supports the work beside said roll.

p To hold the work against the roll 22 for its advance during the burnishing operation, there is secured in the frame-arms I6 and I8 a vertical spindle 36 to which is attached, by setscrews 38, extensions 40, 40 from a carrier-arm 42. The outer portion of the arm is divided at 44, 44', and in these divisions a spindle 46 is longitudinally movable in an inclined direction inwardly and downwardly. In a slot in the lower extremity of the spindle 46, a short bar 48 is clamped, and extendnginwardly from this bar is a'stub-shaft 50. Rotatable about this shaft is a pressure-roll 52, the periphery of which is frusto-conical, the angle beingsuch that opposite the work-supporting roll 22 it will present a workengaging surface vtransversely -parallel thereto. The roll 52 is urged against the work, lying upon the table and over the roll 22, by aV spring 54 surrounding the spindle 46 between the upper arm-division 44 and a collar 56 secured to the spindle by a set-screw 58. f By altering the position of the collar along the spindle, the force exerted by the spring may be increased or decreased. Projections 51 from the collar 56 at opposite sides of the carrier-arm 42v may prevent the'rotation of the spindle 46. By clamping 'the collar ati-different angles about the spindle, the angle ofthe roll 52 about the axis of said spindle may be correspondingly changed. The extent of downward movement of the roll 52 may be variably determined by a collar 60, fixed to the spindle 46 by a set-screw 62 and engaging the lower arm-division 44. The vertical relation of the pressure-roll 52 and its angular relation about a vertical axismay be changed by shiftingA the carrier-,arm 42. upon thefspindle'36. vTo elevate the spindle 46 withV the roll 52 for the introduction vorfremoval of work, a lever 64 is shown aslfulcruined upon' the frame-arm I4, it extendat 'one end'beneath the'collar 56. The'lever is normally held by a spring 66 against a stop 68 upon the frame, it then being clear of the collar. When the lever is rocked clockwise (Fig. l) by a treadle-connection 10, it engages the collar to raise the roll.

Oscillating close to the inner side of the bite of the rolls 22 and 52 is a burnishing tool 12. The operating portion of this tool lies in a substantially horizontal direction in the plane of the work and has a concave face 14 for contact with the edge of said work. The shank 16 of the tool extends vertically and is attached by a slot-andscrew connection '18 to the depending arm 80 of an operating lever 82. A horizontal portion of the lever is fulcrunred at 84 to a plate 86 which has opposite vertical ilanges 88, 88 attached to the frame-arm-division I6. The plate is spaced suiiciently from the under side of the arm to receive the lever and a portion of its actuating elements. In the lever, as appears in Fig. 3, is a slot in which may move a slide 92. 'Ihe slide is provided with a vertical opening to receive a projection 94, eccentrically formed upon the lower extremity of a shaft 96 journaled vertically in the frame-arm-divisions 6 and |8. The shaft 96 is rotated by belt-gearing 98 from the shaft 32, to oscillate the lever 82 and thus move the tool 12 rapidly back and forth along the edge of the work. Said Work is conveniently located to receive this action by an edge-gage 00 adjustable toward and from the path of the work by a slot-andscrew connection |02. An adjustable abutment member |04 may be used to more securely retain the gage against'displacement. The work-contacting end of the gage is shown as concaved at |06 to better guide the work.

To give the proper burnishing eifect, the tool 'l2 is heated. For this purpose I prefer to use an electric unit |08 to which current is delivered through conductors |09, |09. The unit is of such a character that it presents a heated surface |0 extending for a considerable distance along the path through which the tool oscillates. The unit may have grooved edges which receive opposite angular projections ||2, ||2 from the sides of a holder ||4. This holder is shown as carried by the lower extremity of a supporting rod |I6 which passes througha vertical opening in a bracket |20 and is secured therein by a set-screw ||8. The bracket |20 is fixed by a slot-andscrew connection |22 to the arm-division I6. The mounting of the unit allows it to be adjusted both toward and from the burnishing tool and in a direction parallel to its shank, so the degree of heat desired may readily be obtained. By mounting the unit in a xed position independently of the movable tool, yet exerting a constant heating effect upon it, the supply of current and the organization generally may` be much simplified.

In using the apparatus, a margin of a workpiece W is laid upon the table with the edge to be burnished positioned by the gage |00. To the edge, wax or other dressing may have been applied. To permit the introduction of the work, the pressure-roll 52 will have been elevated by the treadle-connection 10, and when said work is in place, the treadle is freed to allow the spring 54 to force the pressure-roll against the work and the Work against the supporting roll 22. The amount of pressure is determined by the adjustment of the collar 56 upon the spindle 46. The driving shaft 32 being in rotation, the upper work-engaging surface of the supporting roll 22 is rotated away from the observer in Fig; 1. As the ribs 24 engage the under surface of the work,

their inclination will cause them to tend to move it in two directions; that is, there will be a component of the force exerted circumferentially of the roll and a second component acting at right angles thereto. The rst feeds the work forward, while the second urges it toward the gage |00 and against the burnishing surface 14 of the tool. At the same time, since the pressure of the roll 52, as a result of its inclined m'ovement, is not only directed downwardly but also inwardly, its engagement with the upper side of the work will force said work toward the tool and gage. The operator is thus largely relieved of the necessity of guiding the work and a rm contact of the burnishing surface with the work-edge is insured. By combined use of the adjustments at 38, 62 and 18, the relation of the roll 52 to the margin of the work, both vertically and horizontally, and of the tool-surface 'I4 to the edge of said work, may accurately be attained. Current will be iiowing through the electric unit |08, and the tool 'l2 Awill be in oscillation and heated by the proximity of the surface I0. By the adjustments at ||8 and |22, the amount of heat received by the tool is made sufficient to produce the proper burnish- "l ing effect. 'I'he desired extent of the edge of the work-piece having been subjected to the action of .the tool, the machine is ready for the succeeding operation. It will be seen that the manner of presenting the work to the tool is most convenient 9 for the operator and that the mechanism by which said tool is actuated is simple and compact.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In an edge-burnishing machine, means for advancing work in a substantially horizontal plane, an actuating lever having a depending portion extending toward the work and with burnishing means extending from said depending portion in the plane of the work, and means for oscillating the lever.

2. In an edge-burnishing machine, means for advancing work in a substantially horizontal plane, a tool-actuating lever having a portion extending vertically toward the work, means for oscillating the lever, and a burnishing tool provided with a shank secured to the lever and with a work-edge-engaging portion extending at an angle to the shank in the plane of the work.

3. In an edge-burnishing machine, a work-sup porting table, Work-advancing means co-operating with the table, a lever fulcrumed above the table and having a portion extending downwardly toward the advancing means, and a burnishing tool secured to the lever and provided with a portion extending substantially parallel to the table and having a concave end for engagement with the work-edge.

4. In an edge-burnishing machine, means for advancing the work in a substantially horizontal plane, a tool-operating lever having a depending portion extending toward the work, means for oscillating the lever, a burnishing tool provided with a shank secured to the lever and with a workedge-engaging portion extending at an angle to the shank in the plane of the work, and means arranged to secure the tool in diierent positions upon the lever.

5. In an edge-burnishing machine, the combination with an overhanging frame, of means for feeding the work carrier thereby, a plate supported on and in parallel spaced relation to the under side of said frame, a slotted lever fulcrumed Cil in the space between the frame and the plate and having a burnishing portion, an apertured slide in the slot of said lever and held therein by said plate, and a shaft rotatable in the frame about the lever and provided with an eccentric portion journaled in the apertured slide in said space.

6. In an edge-burnishing machine, the combination with a frame having an overhanging arm, of work-supporting means carried by the frame beneath the arm, a lever fulcrumed horizontally upon the arm and provided with ,a depending portion upon which is a burnishing surface, and means for oscillating the lever.

7. In an edge-burnishing machine, the combination with a frame having an overhanging arm, a plate secured to the arm and spaced from a surface thereof, a lever fulcrumed in the space and having burnishing means, means for oscillating the lever, and means for presenting work to the burnishing means.

8. In an edge-burnishing machine, a movable burnishing tool, and feeding members engaging the work-margins at opposite sides of the edge to be burnished, both of said members exerting a lateral force upon the work to urge its edge against the burnishing tool.

9. In an edge-burnishing machine, a movable burnishing tool, a work-feeding roll rotatable in engagement with the work, means for rotating the roll, and a pressure member movable in engagement with the work at the opposite side from the feeding roll and in a direction inclined inwardly toward the tool to force the work both against the roll and against the burnishing surface of the tool.

10. In an edge-burnishing machine, a movable burnishing tool, a work-feeding roll rotatable in engagement with the work, the work-engaging surface having ribs extending transversely thereof and being inclined with respect to the axis of the roll, means for rotating the roll to simultaneously advance the work and force it against the burnishing surface of the tool, a pressure-roll movable against the work at the opposite side from the feeding roll, and a yieldable mounting for the pressure-roll movable in an inclined relation both toward the feeding roll and toward the burnishing tool.

11. In an edge-burnishing machine, a movable burnishing tool, a rotatable work-supporting roll situated at one side of the tool, a rotatable pressure-roll engaging the Work at the side opposite the supporting roll, a spindle upon which the pressure-roll rotates, a mounting through which the spindle moves in a direction inclined inwardly toward the burnishing tool, and a spring forcing the spindle through the mounting toward the work and tool.

12. In an edge-burnishing machine, a movable burnishing tool, .a rotatable work-supporting roll situated at one side of the tool, a rotatable pressure-roll engaging the work at the side opposite the supporting roll, a spindle upon which the pressure-roll rotates, a mounting through which the spindle moves in a direction inclined inwardly toward the burnishing tool, two collars secured to the spindle for adjustment longitudinally thereof, and a spring interposed between the mounting and one of the collars and acting to urge the pressure member toward the work and the other collar toward the mounting.

13. In an edge-burnishing machine, a frame, a burnishing tool movable upon the frame in contact with the work, a Work-supporting roll rotatable upon the frame in co-operation with the tool, a mounting movable upon the frame toward and from the Work, means arranged to x the mounting in different positions upon the frame, a pressure-roll movable upon the mounting in a direction inclined with respect to the direction of movement of the mounting, and a spring urging the pressure-roll toward the work.

14. In an edge-burnishing machine, a frame, a burnishing tool movable upon the frame in contact with the work, a work-supporting roll rotatable upon the frame in co-operation with the tool, a spindle secured in the frame, an arm carried by the spindle, means arranged to x the arm in different positions upon the spindle, and a pressure member movable upon the arm.

15. In an edge-burnishing machine, a frame, a burnishing tool movable upon the frame in contact with the work, a work-supporting roll rotatable upon the frame in co-operation with the tool, a substantially vertical spindle secured in the frame, an arm carried by the spindle, a spindle movable upon the arm in a direction inclined downwardly .and inwardly toward the work-supporting roll, a pressure-roll rotatable upon the spindle for contact with the work, and a spring urging the pressure-roll toward the work-supporting roll.

16. In an edge-burnishing machine, means for advancing the work, a burnishing tool, means for oscillating the tool along the path of the work, a holder variable in position with respect to the tool, and an electrical heating device mounted upon the holder for heating the tool.

17. In an edge-burnishing machine, means for advancing the work, a burnishing tool, means for oscillating the tool along the path of the work, a holder variable in position in a plurality of directions at dilerent angles to one another, and an electrical heating device mounted upon the holder for heating the tool.

18. In an edge-burnishing machine, a frame, means movable thereon for advancing the work, a burnishing tool movable in the frame, a bracket variable in position upon the frame, a holder variable in position upon the bracket, and an electrical heating device mounted upon the holder.

GEORGE BOULTON. 

